PLA/椰壳纤维阻燃复合材料的制备与性能研究  

Study on Preparation and Properties of Flame-retardant PLA/Coir Fiber Composite

作　　者：杨舒宇[1] 徐鼐[1] 庞素娟[1] 潘莉莎[1] 陈煊[1] 李建峰[1] 邱华[1] 

机构地区：[1]海南大学材料与化工学院,海南海口570228

出　　处：《塑料科技》2015年第1期69-73,共5页Plastics Science and Technology

基　　金：2012年国家级大学生创新创业训练计划项目(201210589006);海南大学本科生科研创新项目(HDCX2012022);海南省自然科学基金项目(514206)

摘　　要：将椰壳纤维、环氧包覆型聚磷酸铵(EAPP)与聚乳酸(PLA)进行熔融共混,得到一种环境友好型PLA阻燃复合材料。通过燃烧实验、热重分析(TGA)、极限氧指数(LOI)测试和差示扫描量热分析(DSC),研究了EAPP及椰壳纤维的添加对PLA复合材料阻燃性能和结晶性能的影响。结果表明:EAPP与椰壳纤维具有良好的协同阻燃作用,成炭效果显著。当加入10%椰壳纤维以及20%的EAPP后,PLA复合材料的LOI可达34.6%,UL94测试通过V-0级。另外,EAPP的加入显著提高了PLA基体的结晶速率和结晶度,说明EAPP对PLA基体起到了异相成核剂的作用。Polylactic acid （PLA） was blended with coir fiber and epoxy coated ammonium polyphosphate （EAPP） to prepare an environment-friendly flame-retardant composite. The effects of EAPP and coir fiber on flame retardance and crystallization behaviors of the PLA composite were studied by means of combustion experiment, thermogravimetric analysis （TGA）, limited oxygen index （LOI） test and differential scanning calorimeter （DSC） analysis. The results indicate that： there is a synergistic flame retardant effect between EAPP and coir fiber in the PLA composite, and the flameretardant system displays good charring effect. As the contents of coir fiber and EAPP are 10% and 20% respectively, the LOI value of the PLA composite increases to 34.6%, and UL 94 classification reaches to V-0. Moreover, the introduction of EAPP can obviously increase the crystallization rate and crystallinity of PLA matrix. It can be attributed to the heterogeneous nucleation effect of EAPP on PLA matrix.

关 键 词：聚乳酸 椰壳纤维 阻燃 结晶 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ323.4[化学工程—合成树脂塑料工业]